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公开(公告)号：US20170155191A1
公开(公告)日：2017-06-01
申请号：US15361098
申请日：2016-11-25
Inventor： Eun Hee KIM , Ju Derk PARK , In Hwan LEE , Ho Yong KANG , Jae Heum LEE
CPC classification number: E02D29/14 , H01Q1/04 , H01Q1/40 , H01Q5/364 , H01Q9/0421
Abstract: Disclosed is a manhole type omnidirectional antenna having a relatively small angle between a main beam direction and the Earth's surface and exhibiting omnidirectional characteristics to allow long-range communication, wherein the manhole type omnidirectional antenna includes a manhole cover installed in a manhole in the Earth's surface; a main body installed in a cavity of an upper surface of the manhole cover and configured to convert an electrical signal into an electromagnetic wave to wirelessly communicate with a gateway separated from the manhole cover; and a radome inserted into the cavity to cover the main body.
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Patent Agency Ranking
公开(公告)号：US20200314927A1
公开(公告)日：2020-10-01
申请号：US16733153
申请日：2020-01-02
Inventor： Wun Cheol JEONG , Eun Hee KIM , Tae Joon PARK , Geon Min YEO , Kye Seon LEE
Abstract: Disclosed are methods and apparatuses for relaying messages in LPWAN. An operation method of a terminal may comprise transmitting a first join request message to a base station without IQ inversion; when a number of failed transmissions of the first join request message is greater than or equal to a preconfigured threshold, transmitting an IQ-inverted second join request message to a relay; and receiving a join response message from the relay that is a response to the second join request message. Accordingly, the performance of the communication system can be improved.
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公开(公告)号：US20230199731A1
公开(公告)日：2023-06-22
申请号：US18084937
申请日：2022-12-20
Inventor： Tae Joon PARK , Jae Sun CHA , Eun Hee KIM
IPC: H04W72/0446 , H04W72/543
CPC classification number: H04W72/0446 , H04W72/543
Abstract: The present invention relates to a method and apparatus for radio communication of a time sensitive network. The method includes dividing, by the first node, a frame into a downlink section and an uplink section, transmitting, by the first node, downlink data to at least one second node in units of slots in the downlink section, and receiving, by the first node, uplink data from the at least one second node in units of slots in the uplink period.
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公开(公告)号：US20170294711A1
公开(公告)日：2017-10-12
申请号：US15484449
申请日：2017-04-11
Inventor： Eun Hee KIM , Ju Derk PARK , In Hwan LEE , Ho Yong KANG , Jae Heum LEE
CPC classification number: H01Q5/50 , H01P1/20363 , H01P1/2039 , H01P3/08
Abstract: Provided is a method of improving a bandwidth of an antenna using a transmission line stub to enable long-range communication together with broadband matching. According to the method, it is possible to combine a transmission line stub in series or parallel with a feeding point, which is an antenna signal input/output point of a body serving as an antenna, and apply the transmission line stub to an antenna for wide use.
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公开(公告)号：US20240188123A1
公开(公告)日：2024-06-06
申请号：US18526211
申请日：2023-12-01
Inventor： Jae Sun CHA , Eun Hee KIM , Tae Joon PARK , Kye Seon LEE
IPC: H04W74/08
CPC classification number: H04W74/08
Abstract: Provided is a method of transmitting an anisochronous packet between devices in a time-sensitive wireless network. The method includes determining whether a whole packet to be transmitted is transmittable within a residual time of a contention period (CP), when the whole packet to be transmitted is not transmittable within the residual time of the CP, segmenting the packet to be transmitted into packet fragments with a length which is transmittable within the residual time of the CP, adding packet fragment information to the packet fragments, and transmitting one of the packet fragments within the residual time of the CP.
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6.发明申请公开(公告)号：US20220167287A1
公开(公告)日：2022-05-26
申请号：US17533833
申请日：2021-11-23
Inventor： Tae Joon PARK , Eun Hee KIM , Jae Sun CHA , Jung Hoon OH , Kye Seon LEE
Abstract: An operation method of an access point (AP) and a terminal, in a wireless time sensitive network (WTSN), may comprise: receiving, by an AP, an uplink frame from a first terminal; generating compensation indication information for compensation to be performed in the first terminal according to channel information between the first terminal and the AP estimated based on the uplink frame; transmitting the compensation indication information to the first terminal through a downlink frame; and performing, by the first terminal, the compensation based on the compensation indication message transmitted through the downlink frame.
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